1

我有以下代码应该是动画的三帧，如何将它们变成 Kinetic.js 中的动画？这是一个像吃豆人一样的六角形，可以打开和关闭它的嘴。我有三个画布图像，作为三个框架，Kinetic.js 中是否有任何内置函数可以做到这一点？还是我应该从头开始创建一个？在我制作了精灵之后，我怎样才能在不破坏动画的情况下进行其他动画，比如移动它或旋转它（吃豆人应该仍然张开和关闭它的嘴）？

        pacMan1 = new Kinetic.Shape({
            x: 15,
            y: 13,
            //fill: 'rgb(62, 53, 67)',
            // a Kinetic.Canvas renderer is passed into the drawFunc function
            drawFunc: function (canvas) {
                var context = canvas.getContext();
                // layer1/Compound Path
                context.save();
                context.beginPath();

                // layer1/Compound Path/Path
                context.moveTo(54.0, 12.8);
                context.lineTo(34.2, 1.4);
                context.bezierCurveTo(31.2, -0.3, 27.6, -0.3, 24.7, 1.4);
                context.lineTo(4.9, 12.8);
                context.bezierCurveTo(1.9, 14.5, 0.1, 17.7, 0.1, 21.0);
                context.lineTo(0.1, 43.9);
                context.bezierCurveTo(0.1, 47.3, 1.9, 50.5, 4.9, 52.1);
                context.lineTo(24.7, 63.6);
                context.bezierCurveTo(27.6, 65.3, 31.2, 65.3, 34.2, 63.6);
                context.lineTo(54.0, 52.1);
                context.bezierCurveTo(56.9, 50.5, 58.7, 47.3, 58.7, 43.9);
                context.lineTo(58.7, 21.0);
                context.bezierCurveTo(58.7, 17.7, 56.9, 14.5, 54.0, 12.8);
                context.closePath();

                // layer1/Compound Path/Path
                context.moveTo(32.3, 10.8);
                context.bezierCurveTo(30.7, 10.8, 29.5, 9.5, 29.5, 8.0);
                context.bezierCurveTo(29.5, 6.4, 30.7, 5.1, 32.3, 5.1);
                context.bezierCurveTo(33.9, 5.1, 35.1, 6.4, 35.1, 8.0);
                context.bezierCurveTo(35.1, 9.5, 33.9, 10.8, 32.3, 10.8);
                context.closePath();
                context.fillStyle = "rgb(62, 53, 67)";
                context.fill();
                context.lineWidth = 0.3;
                context.stroke();
                canvas.fillStroke(this);
                context.restore();
            }
        });
        pacMan2 = new Kinetic.Shape({
            x: 15,
            y: 13,
            //fill: 'rgb(62, 53, 67)',
            // a Kinetic.Canvas renderer is passed into the drawFunc function
            drawFunc: function (canvas) {
                var context = canvas.getContext();
                // layer1/Compound Path
                context.save();
                context.beginPath();

                // layer1/Compound Path/Path
                context.moveTo(29.1, 36.9);
                context.bezierCurveTo(27.6, 36.0, 26.7, 34.5, 26.7, 32.8);
                context.bezierCurveTo(26.7, 31.2, 27.6, 29.6, 29.1, 28.8);
                context.lineTo(55.2, 13.7);
                context.bezierCurveTo(54.8, 13.4, 54.4, 13.1, 54.0, 12.8);
                context.lineTo(34.2, 1.4);
                context.bezierCurveTo(31.2, -0.3, 27.6, -0.3, 24.7, 1.4);
                context.lineTo(4.9, 12.8);
                context.bezierCurveTo(1.9, 14.5, 0.1, 17.7, 0.1, 21.0);
                context.lineTo(0.1, 43.9);
                context.bezierCurveTo(0.1, 47.3, 1.9, 50.5, 4.9, 52.1);
                context.lineTo(24.7, 63.6);
                context.bezierCurveTo(27.6, 65.3, 31.2, 65.3, 34.2, 63.6);
                context.lineTo(54.0, 52.1);
                context.bezierCurveTo(54.2, 52.0, 54.5, 51.8, 54.7, 51.7);
                context.lineTo(29.1, 36.9);
                context.closePath();

                // layer1/Compound Path/Path
                context.moveTo(32.3, 5.1);
                context.bezierCurveTo(33.9, 5.1, 35.1, 6.4, 35.1, 8.0);
                context.bezierCurveTo(35.1, 9.5, 33.9, 10.8, 32.3, 10.8);
                context.bezierCurveTo(30.7, 10.8, 29.5, 9.5, 29.5, 8.0);
                context.bezierCurveTo(29.5, 6.4, 30.7, 5.1, 32.3, 5.1);
                context.closePath();
                context.fillStyle = "rgb(62, 53, 67)";
                context.fill();
                context.lineWidth = 0.3;
                context.stroke();
                canvas.fillStroke(this);
                context.restore();
            }
        });
        pacMan3 = new Kinetic.Shape({
            x: 15,
            y: 13,
            //fill: 'rgb(62, 53, 67)',
            // a Kinetic.Canvas renderer is passed into the drawFunc function
            drawFunc: function (canvas) {
                var context = canvas.getContext();
                    // layer1/Compound Path
                    context.save();
                    context.beginPath();

                    // layer1/Compound Path/Path
                    context.moveTo(32.0, 36.9);
                    context.bezierCurveTo(28.7, 36.0, 26.7, 34.5, 26.7, 32.8);
                    context.bezierCurveTo(26.7, 31.2, 28.7, 29.6, 32.0, 28.8);
                    context.lineTo(58.7, 22.0);
                    context.lineTo(58.7, 21.0);
                    context.bezierCurveTo(58.7, 17.7, 56.9, 14.5, 54.0, 12.8);
                    context.lineTo(34.2, 1.4);
                    context.bezierCurveTo(31.2, -0.3, 27.6, -0.3, 24.7, 1.4);
                    context.lineTo(4.9, 12.8);
                    context.bezierCurveTo(1.9, 14.5, 0.1, 17.7, 0.1, 21.0);
                    context.lineTo(0.1, 43.9);
                    context.bezierCurveTo(0.1, 47.3, 1.9, 50.5, 4.9, 52.1);
                    context.lineTo(24.7, 63.6);
                    context.bezierCurveTo(27.6, 65.3, 31.2, 65.3, 34.2, 63.6);
                    context.lineTo(54.0, 52.1);
                    context.bezierCurveTo(56.9, 50.5, 58.7, 47.3, 58.7, 43.9);
                    context.lineTo(58.7, 43.7);
                    context.lineTo(32.0, 36.9);
                    context.closePath();

                    // layer1/Compound Path/Path
                    context.moveTo(32.3, 5.1);
                    context.bezierCurveTo(33.9, 5.1, 35.1, 6.4, 35.1, 8.0);
                    context.bezierCurveTo(35.1, 9.5, 33.9, 10.8, 32.3, 10.8);
                    context.bezierCurveTo(30.7, 10.8, 29.5, 9.5, 29.5, 8.0);
                    context.bezierCurveTo(29.5, 6.4, 30.7, 5.1, 32.3, 5.1);
                    context.closePath();
                    context.fillStyle = "rgb(62, 53, 67)";
                    context.fill();
                    context.lineWidth = 0.3;
                    context.stroke();
                    canvas.fillStroke(this);
                    context.restore();
                }
        });
4

2 回答 2

4
于 2013-09-11T00:56:42.360 回答
0

您可以使用Kinetic.Animation带有 switch 语句来确定要显示哪个帧，如下所示：

    var group = new Kinetic.Group({
        x:10,
        y:10
    });

    group.add(pacMan1);
    group.add(pacMan2);
    group.add(pacMan3);
    layer.add(group);
    layer.draw();

    pacMan2.hide();
    pacMan3.hide();

    var frameCount = 0;
    var anim = new Kinetic.Animation(function (frame) {
        frameCount++;
        var mod = frameCount % 30;
        switch (mod) {
            case 0:
                pacMan1.show();
                pacMan2.hide();
                pacMan3.hide();
                break;
            case 10:
                pacMan1.hide();
                pacMan2.show();
                pacMan3.hide();
                break;
            case 20:
                pacMan1.hide();
                pacMan2.hide();
                pacMan3.show();
                break;
        }
        group.setX(group.getX()+1);
    }, layer);

    anim.start();

您可以通过更改模数公式和案例编号使帧通过得更快。 

//Faster
var mod = frameCount % 3;
switch (mod) {
    case 0:
        break;
    case 1:
        break;
    case 2:
        break;
}

//Slower
var mod = frameCount % 300;
switch (mod) {
    case 0:
        break;
    case 100:
        break;
    case 200:
        break;
}

如果你想让他移动得比改变x增加的间隔更快：

//Move 5 pixels every frame.
group.setX(group.getX()+5);

JSFIDDLE

这不是一个很好的答案，但它是一个开始。

另一种方法

我想用这个toImage()方法把你的hex形状变成图像，然后在Kinetic.Sprite

http://kineticjs.com/docs/Kinetic.Shape.html#toImage

http://kineticjs.com/docs/Kinetic.Sprite.html

还有一个教程：http ://www.html5canvastutorials.com/kineticjs/html5-canvas-kineticjs-sprite-tutorial/

但是，我认为问题在于您需要为精灵设置图像（例如：http ://www.html5canvastutorials.com/demos/assets/blob-sprite.png ）

理想情况下，尽管出于您的目的，我认为使用 aKinetic.Sprite是您正在寻找的东西，因此，如果您可以使用 pac man 形状设置基于 sprite 的图像，那么您将可以使用sprite做很多事情。

于 2013-09-10T20:18:40.453 回答